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J. W. KECKHEFER.

PAPER TUBE AND METHOD of MAKING THE SAME.

APPLICATION FILED MAYILN.

l Patented A110'. 26, 1919.

@Nm um,

UNITED STATES PATENT OFFICE.

JOHN W. KIECKHEFER, OF MILWUAKEE, WISCONSIN, ASSIGN OR TO KIECKHEFER PAPER COMPANY, OF MILWAUKEE, WISCONSIN, A CORPORATION 0F WIS- CON SIN Specification of Letters Patent.

Patented Aug. 26, 1919.

Application filed May 1., 1918. Serial No. 231,881.

To all lwhom, t may concer/n.'

Be it known that I, J oHN W. KIECKHEFER, a citizen of the United States, residing at l\lilwaukee, in the county of Milwaukee and State of lVisconsin, have invented certain new and useful Improvements in Paper Tubes and Methods of Making the Same, of which the following is a specification.

The object of the invention is the production of a tube of paper or other` fibrous material or fabric which shall have the exterior and interior plies or layers impervious to water or moisture and the central or intermediate plies er layers in a normalf state or condition preferably united by a suitable waterproof cement or adhesive whereby ample strength and rigidity are secured for the tube.

The invention consists in the fashioned tube itself as an article possessingthe characteristics herein set forth, and also in the method or process of making the same, said method consisting generally in cutting to shape preferably an unsized sheet of paper or similar fabric of fibrous material, applying a suitable waterproof cement or adhesive to one surface except an area at one end equal to the area of the inner surface of thc fashioned tube, rolling the paper or fabric upon itself, thus producing a united tubular body having the entire areas of the interior and exterior surfaces in a normal stateor condition, immersing the tube in a Waterproofing compound or applying the Waterproofing compound to these surfaces, and finally subjecting the tube thus treated to y heat of a temperature high enough to partially liquefy the compound snfiiciently to4 allow its thorough penetration lof the interior and exterior plies or layers of the tube, or, in other words` to allow the Waterproofing compound to be absorbed by the inner and outer layers only, the cement or adhesive material preventing its material penetration to the interior ply or layer or layers.

The invent-ion further consists in adding to the Waterproofing compound Wax tailings or linseed oil or other similar material and impregnating the inner and outer plies of the tube With this compound when it is desired to harden and toughen the surfaces of the tube and so it will be smooth and not crock. and, further, so it will have a polished or glossy appearance.

The accompanying drawing illustrates a tube of the structure and character set forth, also the paper or other fabric treated with the waterproof cement or adhesive, and the first rolled ply or layer of the tube, when made according to my improved method of manufacture.

Figure l is a plan view of a sheet of paper part of one surface having the cement or adhesive applied thereunto.

Fig. 2 shows the sheet of paper with the untreated' portion rolled with its edge in contact with the edge of the cement covered surface.

Fig. 3 illustrates the completed tube.

Fig. 4 is an enlarged cross section of Fig. 3 on line -l-L Fig, 5 is an enlarged section through the wall of thel tube to show the plies or layers of paper and cement.

'lhc following is an exposition of the best mode or method of procedure in making the tube which l have so far devised.

A. sheet of paper 1 of suitable thickness preferably unsized is cut to the desired dimensions` the width corresponding to the length of the tube to be formed and the length corresponding to the number 'of plies or layers the tube wall is designed to have when rolled.

To the area 2 of one surface of the sheet a waterproofing cement of adhesive-casein treated with lye and ammonia-is applied,

the area 3 being untreated or in its natural lor normal state or condition.

Next, the end of the sheet having the untreated area 3 is turned or rolled over so its edge engages the edge of the area 2 covered with the waterproofing cement or adhesive and the rolling process is continued until the entire sheet has been rolled, the surface having the adhesive area engaging the under or untreated surface of the sheet to which it is firmly and adhesively held, as is obvious.

A suitable number of tubes, as thus far fashioned, are then immersed in a bath of asphaltum or preferably asphaltum containing wax tailings, or the compound maybe applied to the exposed surfaces in any other way` the compound being heated to a tcmpcraturc of' approximately 135 F.

Finally, the tubes are removedy from the bath when the asphaltum is applied by im mersin the tubes and subjected to heat for a suita le period of time, -preferaJblyinaI receptacle or chamber the temperature of which is from 200 F. to 250 F.

The individual tube thus ma'de has the following characteristics: The tube is water and moisture-proof as the waterproofing compound-asphaltum with the wax Atailings mixed therewith-has penetrated and impregnated the 'exterior and interior ex posed plies or layers of the paper thoroughly and to the central layer orlayers having the waterproof cement or adhesive material be tween their surfaces', the central or interior plies or layers being in their normal state or condition and not materially penetrated by the asphaltum, thus retaining their original strength and securing the required rigidity of the finished tu'be. The waterprooinl compound has also penetrated for a limite distance into the exposed ends ofthe tube, making them also water and moisture-proof. l Further, due to the presence of the wax tailings in the asphaltum, the interior and exterior surfaces of the tube are relatively hard, tough and'smooth, presenta polished or glossy appearance, and there is no crock to soil the hands or any object with which the tube may come in contact. The surfaces are such that ,the tubes will not stick together nor will powdered material orobjects contained within the tubes adhere to thel inner surface thereof. v

Tubes made substantially as set forth have 'under the Mullen standard test disclosed relatively great strength, and V.when im- Vmersed under *water with the ends closedv for twenty four hours have shown no sign of leakage or of moisture on the interior, and moreover, no evidence was present of the softening of the tu'be wall.

Fig. 5 of the drawin shows a tube with thewall composed of ve plies or layers, 4 designating the outer .and innerplies 'or layers thoroughly 'impregnated with asphaItmn, as described, 5, the plies in their normal statel or condition substantially un impregnated by the waterproofingV com-V pound, and 6 thin layers of waterproof cement. y L I In the practiceY of theparticular method of manufacture set forth I lhave found that the waterproofing cementor adhesive speci' ied-casem treated with lye and ammoniaserves well for the purpose intended, as it; doesnot appear 'to penetrate the paper exce'ssively or to be -soldble in the asphaltum or tofbe injuriously a'ected b heat to the extent of'rendering it unsuitab e for its purpose, but, other waterproof adhesives may be usedin lieu thereof, especially such as will not allow the Waterproofing cpmpound, as

. asphaltum, excessively to penetrate andim- :terasse pregnate theinn'ercply or plies of the tube. Likewise impregnating waterproofing compounds other than asphaltum and its com-` pounds may be used for the same purpose.

have-specified the particular cement and lmpregnating compound by `way of example, as they have been found etlicientv and sati-s- Vfactory in practice.`

able tools or4 machinery may be employed in'x carrying out the method or process of manufacture and unsubstantial changes in the" Asteps be introduced without constituting real departures from the method.

What 'l'claim is: l. As an article of manufacture, a tube of paper or other fibrous material comprised of a plurality of superimposed plies or layers, the exterior and interior plies only be. ing impregnated with a waterproofing compound.

2. As an article of manufacture, a tube of paperorother fibrous material comprised 3. As an article of manufacture, a tube of` paper or other fibrous material comprised of a plurality of superimposed plies or layers,

a waterproof'cement or adhesive interposed vof a plurality of superimposed fplies or laybetween the central plies, and the exterior and interior plies impregnated with a'w'ater- PIOOllg compound. v v I 4 AS an-'article of' manufacture, a tube of paper or'other fibrous materialy comprised of a pluralit Y of'superim ed plies 'orlay' ers the exterior and interior pregnated with a waterproo containing oil. p Y

le of manufacture,;a tube 5. As an'arti.

of paper or other lbrous'material comprisedV of a pluralityof superimposed plies 'or layers the 'exterior'and interior lies being impregnated with a waterproo compound containing an oil, and a waterproof compound interposed between the centraland the outer and inner 6. As anarticle of. manufacture, va: tube of paper orother fibrous materia comprised of a plurality of superimposed plies or laylies being 11n-3 Eng compound? l ffl pregnated with awaterproofing compound containing asphaltum and an oil.

8. As an article of manufacture, a tube of y paper or other fibrous material comprised of a plurality of superimposed plies or layers, the inner and outer plies or layers only being impregnated with a waterproofing compound c-ontaining a material such as Wax failings which impart to the exterior and interior 'surfaces a smooth and polished appearance.

9. As an-article of manufacture, a tube of paper er other fibrous material comprised of a plurality of superimposed plies or layers the inner and outer layers being impregnated .with a waterproofing compound containing asphaltum and an 011, and a VWaterproof cement or adhesive interposed y between the central plies or. layers.

10.` The method of making a tube of paper or otherfibrous material consisting in applying to part of' one surface of a sheet of the material a waterproofing cement or adhesive, rolling the sheet to a tubular shape, applying to the exposed surfaces of the tube a' waterproofing compound, and finally subjecting the tube thus treated to heat.

41.1. The method of making a tube of paper or other fibrous material consisting in applying to part of one surface of a sheet of the material a waterproofin cement or adhesive,

rolling the sheet to a tu ular shape, treating the interior and cxtrerior'plies with a waterproof compound contamlng an oil, and hnally'subjectlng the tube thus treated to heat.

12. The method of making a tube of paper' or other fibrous material consisting in applylng to part of one surface of a sheet of the materlal a waterproof cement or adheslve,

'rolling the sheet to a tubular shape, treating the exterior and interlor plies with a waterproofing compound contalnmg asphaltum,`

and finally subjecting the tube thus treated to heat..

13. The method of making a tube of paper or other fibrous material consisting in applying to part of one surface of a sheet of the material a waterproofing cement oradhesive, rolling the sheet to a tubular shape, treating the exterior and interior plies with a waterproofing compound containing asihaltmn and wax tailings, and finally subjecting the tube thus treated to heat.

1l. The method of making a tube of paper or other fibrous material consisting in superimposing a plurality of' plies of the material one upon another to form a tubular body, interposing a waterproofing cement or adhesire between the central and outer and inner plies, treating the outer and inner surfaces of the'tubular body with a waterproofing compound, and finally subjecting the tube thus treated to heat.

ln testimony whereof I aflix my signature. 

